<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        .left{
            width: 100px;
            float: left;
            height: 100px;
            background-color: pink;
        }
        .right{
            width: 150px;
            float: right;
            height: 100px;
            background-color: yellow;
        }
        .w{
            height: 100px;
            background-color: rgb(221, 48, 48);
            overflow: hidden;
        }
    </style>
</head>
<body>
    <div class="left"></div>
    <div class="right"></div>
    <div class="w"></div>
</body>
</html>